lcdtest.c

l602驱动程序 数据总线为4根 增加了io利用率

#include <avr/io.h>
#include <util/delay.h>
#include <avr/signal.h> 
#include <avr/interrupt.h> 
#include "lcd.h"

#define uchar unsigned char 
#define uint  unsigned int 

void DelayMs(uint t); 
void display_number(uchar num,uchar hex); 
/*
uchar g_aDisplayBuf[16]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,\ 
0x7c,0x39,0x5e,0x79,0x71}; 
uchar g_bCounter=0;
*/
 //外部中断 0 
 #ifndef CP_F
 #define  CP_F   8
 #endif
void DelayMs(uint t)
{
 uint  i; 
 for(i=0;i<t;i++) 
  _delay_loop_2(CP_F  * 250); 

}
void display_number(uchar num,uchar hex)
{
LCDClear();
if(hex==0)
	{
	LCDWriteString("now you input:");
	LCDWriteIntXY(2,1,num,3);
	LCDWriteStringXY(5,1,"continus?");
	}
else
  	{
	}
}
/*
SIGNAL(SIG_INTERRUPT0) 
{ 
uchar num;
DelayMs(100); 
DDRC|=0xf0; //定义为输入引脚
PORTC=_BV(PC0)|_BV(PC1)|_BV(PC2)|_BV(PC3);//键盘引脚上拉电阻开 
num=PINC&0x0f;
display_number(num,0); 
GIFR|=_BV(INTF0);//写 1 清除中断标志,
}
 */
void    key_process()
	   {
	  // unsigned char time,i;
	   uchar key_num,temp_num;
	   
		     //if(bit_is_set(PINA,7))
		     if(PINA&0x80)
			{
			
			key_num=(PINB&0x0f);
                     temp_num=key_num;
			_delay_us(0.3);		 
			 //time=0;
			 if((key_num=(PINB&0x0f))==temp_num)	 
			      {     
			 // PORTC=key_num;
			  display_number(key_num,0);	
			 	}
			 else
			 	{
			 LCDClear();
			 LCDWriteString("....wait you...");
			 	}
		       }
		/*
			else 
			 {
			 //LCDClear();
			 LCDWriteString("@wait you...@");
			 LCDWriteStringXY(0,1,"thanks");	
			 }
	    */
		
	}


void main()
{
	unsigned char i;
       
	//Initialize LCD module
	InitLCD(LS_BLINK|LS_ULINE);

	//Clear the screen
	LCDClear();

	//Simple string printing
	LCDWriteString("ready config ");
	
	//A string on line 2
	LCDWriteStringXY(0,1,"Loading ");
   
	//Print some numbers
	for (i=0;i<10;i+=1)
	{
		LCDWriteIntXY(9,1,i,3);
		LCDWriteStringXY(12,1,"%");
		_delay_loop_2(0);	
		_delay_loop_2(0);	
		_delay_loop_2(0);	
		_delay_loop_2(0);	


	}

	//Clear the screen
	LCDClear();

	//Some more text

	LCDWriteString("Hello everyone");
	LCDWriteStringXY(0,1,"sign you name ");		// <--- Write ur NAME HERE !!!!!!!!!!!

	//Wait
	for(i=0;i<3;i++) _delay_loop_2(0);

	//Some More ......
	LCDClear();
	LCDWriteString("@welcome to@");
	LCDWriteStringXY(0,1,"fenggang space");
	   /*
	MCUCR=_BV(ISC00)|_BV(ISC01);//上升沿触发fg_new
       GICR=_BV(INT0);//外部中断 0 允许 fg_new
       #ifdef __DOXYGEN__
        #undef  __DOXYGEN__
       #endif
	  sei(); //总中断允许   
	  */

DDRA|=0x00; //定义为输入引脚
PORTA=_BV(PA7);
DDRB|=0x00; //定义为输入引脚
PORTB=_BV(PB0)|_BV(PB1)|_BV(PB2)|_BV(PB3);//键盘引脚上拉电阻开 
	  while(1)
	  	{
	  	key_process();
	  	}
	
}